CN205846688U - Small-sized electric leakage overvoltage/undervoltage protection control circuit - Google Patents

Small-sized electric leakage overvoltage/undervoltage protection control circuit Download PDF

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Publication number
CN205846688U
CN205846688U CN201620650686.3U CN201620650686U CN205846688U CN 205846688 U CN205846688 U CN 205846688U CN 201620650686 U CN201620650686 U CN 201620650686U CN 205846688 U CN205846688 U CN 205846688U
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China
Prior art keywords
control circuit
circuit
overvoltage
undervoltage
power supply
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CN201620650686.3U
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Chinese (zh)
Inventor
郑元昌
陈贤卓
叶楠
叶献东
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HUATONG ELECTROMECHANICAL Co Ltd
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HUATONG ELECTROMECHANICAL Co Ltd
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Abstract

nullThis utility model provides a kind of small-sized electric leakage overvoltage/undervoltage protection control circuit,It includes that power supply inputs,It also includes inputting, with power supply, the dropout power circuit being connected、Overvoltage/undervoltage deferred action control circuit、Residual current acting control circuit and residual current detection circuit,Described overvoltage/undervoltage deferred action control circuit includes silicon controlled control circuit、Overvoltage crowbar and under-voltage protecting circuit,Described residual current acting control circuit includes integrated chip IC 1,The output pin of described integrated chip is connected with the trigger electrode of controllable silicon Q3,The detection foot of described integrated chip IC 1 is connected with residual current detection circuit,By arranging overvoltage/undervoltage deferred action control circuit、Residual current acting control circuit and with residual current detection circuit,And share a dropout power circuit,Greatly simplify circuit design,Can be applied in Minitype electrical leakage breaker,Minitype electrical leakage breaker is made to have the effect of overvoltage/undervoltage protection.

Description

Small-sized electric leakage overvoltage/undervoltage protection control circuit
Technical field
This utility model relates to RCCB technical field, is specifically related to the protection of a kind of small-sized electric leakage overvoltage/undervoltage and controls electricity Road.
Background technology
Because the restriction in space in the housing of Minitype electrical leakage breaker own, it cannot realize multi-functional mostly, and existing The electrical equipment often overvoltage operation because of electrical network or circuit question, ultimately results in electrical equipment and damages, or because circuit Insulation damages causes electric leakage, causes safety problem, therefore needs Minitype electrical leakage breaker to have the function of overvoltage/undervoltage protection.
Utility model content
In order to overcome above technical deficiency, this utility model provides a kind of small-sized electric leakage overvoltage/undervoltage protection control circuit.
This utility model provides a kind of small-sized electric leakage overvoltage/undervoltage protection control circuit, and it includes that power supply inputs, and it also includes The overvoltage/undervoltage deferred action control circuit that is connected with dropout power circuit with the power supply dropout power circuit that is connected of input and taking off Detain the residual current acting control circuit that power circuit connects and the residual current being connected with residual current acting control circuit Testing circuit,
Described overvoltage/undervoltage deferred action control circuit includes silicon controlled control circuit, overvoltage crowbar and under-voltage protection Circuit,
Described residual current acting control circuit includes integrated chip IC 1, the output pin of described integrated chip and controllable silicon The trigger electrode of Q3 connects, and the detection foot of described integrated chip IC 1 is connected with residual current detection circuit.
Described overvoltage/undervoltage deferred action control circuit includes controllable silicon Q1, the anode of controllable silicon Q1 and negative electrode respectively with dropout Power circuit connects, the trigger electrode of described controllable silicon Q1 respectively with anode, the negative electrode of diode D6 and the electrolysis of diode D5 The positive pole of electric capacity C3 connects, and the minus earth of electrochemical capacitor C3, the anode of diode D6 meets audion Q2 by resistance R8 respectively Colelctor electrode and electrochemical capacitor C4 ground connection, the negative electrode of diode D5 is connect the base stage of audion Q2, and is connect by electrochemical capacitor C2 Ground, the emitter stage of audion Q2 connects dual power supply trip circuit, and the emitter stage of audion Q2 meets the negative electrode of stabilivolt D7, stabilivolt D7 Plus earth.
Described residual current detection circuit include detection of electrical leakage end Z2 and detection of electrical leakage end Z3, described detection of electrical leakage end Z2 and Detection of electrical leakage end Z3 series resistance R11 and resistance R12 respectively are connected with integrated chip, described detection of electrical leakage end Z2 and detection of electrical leakage Between end Z3, difference parallel resistance R10, electric capacity C10 and electric capacity C11, pass through electric capacity between described resistance R11 and integrated chip C9 ground connection, by electric capacity C13 ground connection between described resistance R12 and integrated chip.
The input of described power supply includes power supply input L end and power supply input N end, and described power supply input L end inputs N end with power supply Between varistor RV in parallel.
Small-sized electric leakage overvoltage/undervoltage protection control circuit is additionally provided with leak(age) test circuit, and described leak(age) test circuit includes test Switch T and resistance R1 one end of series connection with it, the other end of described resistance R1 is connected with power supply input.
Described residual current acting control circuit includes the electrolysis electricity that mu balanced circuit, described mu balanced circuit include being arranged in parallel Holding C8 and stabilivolt D8, the described negative electrode of electrochemical capacitor C8 is connected and ground connection with the anode of stabilivolt, and described electrochemical capacitor C8 is just The negative electrode of pole and stabilivolt D8 is connected with the supply pin of integrated chip.
Described dropout power circuit includes into diode D1, diode D2, diode D3 and two poles that rectifier bridge is arranged Pipe D4 and be connected on the trip coil L1 between the input of power supply and rectifier bridge.
The beneficial effects of the utility model: by arranging overvoltage/undervoltage deferred action control circuit, residual current acting controls Circuit and with residual current detection circuit, and share a dropout power circuit, greatly simplify circuit design so that it is energy Enough it is applied in Minitype electrical leakage breaker so that Minitype electrical leakage breaker has the effect of overvoltage/undervoltage protection.
Accompanying drawing explanation
Fig. 1 is circuit theory schematic diagram of the present utility model.
Detailed description of the invention
Below in conjunction with the accompanying drawings this utility model embodiment is described further:
As it is shown in figure 1, this utility model provides a kind of small-sized electric leakage overvoltage/undervoltage protection control circuit, it includes that power supply is defeated Entering, it also includes the overvoltage/undervoltage deferred action that the dropout power circuit 1 being connected with power supply input is connected with dropout power circuit 1 Residual current acting control circuit 3 that control circuit 2 is connected with dropout power circuit and with residual current acting control circuit The residual current detection circuit 4 connected,
Described overvoltage/undervoltage deferred action control circuit includes silicon controlled control circuit, overvoltage crowbar and under-voltage protection Circuit,
Described residual current acting control circuit includes integrated chip IC 1, the output pin of described integrated chip and controllable silicon The trigger electrode of Q3 connects, and the detection foot of described integrated chip IC 1 is connected with residual current detection circuit, and this integrated chip IC 1 is SN54123, its 7 foot is connected as the trigger electrode of output pin with controllable silicon Q3, and its 8 foot is power end, and external mu balanced circuit is described Mu balanced circuit includes electrochemical capacitor C8 and the stabilivolt D8 being arranged in parallel, the negative electrode of described electrochemical capacitor C8 and the anode of stabilivolt Connecting and ground connection, the negative electrode of described electrochemical capacitor C8 positive pole and stabilivolt D8 is connected with supply pin 8 foot of integrated chip, integrated core It is connected with the positive output end of dropout power circuit after 8 foot series resistances R9 of sheet IC1,6 foot series capacitances C6 of integrated chip IC 1 Being connected with 7 feet afterwards, then by electric capacity C5 ground connection, 4 feet of integrated chip IC 1 and 5 feet connect and pass through electric capacity C7 ground connection, integrated 3 foot ground connection of chip IC 1.
Described overvoltage/undervoltage deferred action control circuit includes controllable silicon Q1, the anode of controllable silicon Q1 and negative electrode respectively with dropout Power circuit connects, the trigger electrode of described controllable silicon Q1 respectively with anode, the negative electrode of diode D6 and the electrolysis of diode D5 The positive pole of electric capacity C3 connects, and the minus earth of electrochemical capacitor C3, the anode of diode D6 meets audion Q2 by resistance R8 respectively Colelctor electrode and electrochemical capacitor C4 ground connection, be sequentially connected in series between negative electrode and the base stage of audion Q2 of diode D5 resistance R7, Resistance R5 and resistance R3, and pull-up resistor R4 connects the positive output end of dropout power circuit between resistance R3 and resistance R5, Between the negative electrode of resistance R7 and diode D5 pull-up resistor R6 connect the positive output end of dropout power circuit, resistance R5 and resistance R7 it Indirectly, the negative electrode of diode D5 passes through electrochemical capacitor C2 ground connection, and the emitter stage of audion Q2 connects dual power supply trip circuit, three poles The emitter stage of pipe Q2 connects the negative electrode of stabilivolt D7, the plus earth of stabilivolt D7, the emitter stage of audion Q2 and dropout power supply electricity Series resistance R2 between the positive output end on road, parallel electrolytic electric capacity C1 between the emitter stage and resistance R3 of audion Q2.
Described residual current detection circuit include detection of electrical leakage end Z2 and detection of electrical leakage end Z3, described detection of electrical leakage end Z2 and Detection of electrical leakage end Z3 series resistance R11 and resistance R12 respectively are connected with integrated chip, described detection of electrical leakage end Z2 and detection of electrical leakage Between end Z3, difference parallel resistance R10, electric capacity C10 and electric capacity C11, pass through electric capacity between described resistance R11 and integrated chip C9 ground connection, by electric capacity C13 ground connection between described resistance R12 and integrated chip.
The input of described power supply includes power supply input L end and power supply input N end, and described power supply input L end inputs N end with power supply Between varistor RV in parallel, play the effect of Anti-surging.
Small-sized electric leakage overvoltage/undervoltage protection control circuit is additionally provided with leak(age) test circuit, and described leak(age) test circuit includes test Switch T and resistance R1 one end of series connection with it, the other end of described resistance R1 is connected with power supply input L end, can directly enter Row leak(age) test.
Described dropout power circuit includes into diode D1, diode D2, diode D3 and two poles that rectifier bridge is arranged Pipe D4 and the negative electrode of trip coil L1, diode D1 being connected between the input of power supply and rectifier bridge and diode D2 Negative electrode connect as positive output end, the anode of diode D3 and the anode of diode D4 connect as negative output terminal, diode The negative electrode of D3 is connected with the anode of diode D1, and the negative electrode of diode D4 is connected with the anode of diode D2, and diode D4 Negative electrode meets trip coil L1, and the negative electrode of diode D3 connects power supply input L end.
Its principle is as follows:
In Fig. 1, power supply input L end, power supply input N end are respectively main circuit Live line Zero line;Detection of electrical leakage end Z2 is with electric leakage Test side Z3 connects transformer, i.e. electric leakage signal receives.When main circuit normally works, controllable silicon Q1 and controllable silicon Q3 is all in disconnection State, trip coil L1 no power, therefore electrical apparatus release will not action.
When main circuit generation leakage condition, detection of electrical leakage end Z2, detection of electrical leakage end Z3 receive electric leakage signal, by collection Becoming chip pin 7 output signal, make controllable silicon Q3 turn on, at this moment electric current just flows through from controllable silicon Q3, through diode D4, makes to take off Button device coil L1 energising, electrical apparatus release is threaded off, is completed creepage protection function.
When main circuit generation under-voltage condition, audion Q2 emitter stage voltage under stabilivolt D7 effect is constant, and base stage Voltage, due to under-voltage and decline, makes audion Q2 turn on, and electrochemical capacitor C4 is charged (for time-lag action) through resistance R8 by voltage, Being then passed through diode D6 makes controllable silicon Q1 turn on after receiving signal, and trip coil L1 is energized, and electrical apparatus release is threaded off, and completes to owe Pressure defencive function.
When main circuit generation overvoltage condition, after electrochemical capacitor C2 charging, make diode D5 reverse-conducting, then to electrolysis After electric capacity C3 charging (for time-lag action), making controllable silicon Q1 turn on, trip coil L1 is energized, and electrical apparatus release is threaded off, and completes under-voltage Defencive function.
Embodiment is not construed as restriction of the present utility model, any based on spirit improvements introduced of the present utility model, All should be within protection domain of the present utility model.

Claims (7)

1. a small-sized electric leakage overvoltage/undervoltage protection control circuit, it includes that power supply inputs, it is characterised in that: it also includes and power supply Input overvoltage/undervoltage deferred action control circuit and dropout power supply that the dropout power circuit connected is connected with dropout power circuit Residual current acting control circuit and the residual current detection that is connected with residual current acting control circuit that circuit connects are electric Road,
Described overvoltage/undervoltage deferred action control circuit includes silicon controlled control circuit, overvoltage crowbar and under-voltage protection electricity Road,
Described residual current acting control circuit includes integrated chip IC 1, and the output pin of described integrated chip is with controllable silicon Q3's Trigger electrode connects, and the detection foot of described integrated chip IC 1 is connected with residual current detection circuit.
Small-sized electric leakage overvoltage/undervoltage the most according to claim 1 protection control circuit, it is characterised in that described overvoltage/undervoltage time delay Control circuit includes that controllable silicon Q1, the anode of controllable silicon Q1 and negative electrode are connected with dropout power circuit respectively, described controlled The trigger electrode of silicon Q1 positive pole with anode, the negative electrode of diode D6 and the electrochemical capacitor C3 of diode D5 respectively is connected, electrolysis The minus earth of electric capacity C3, the anode of diode D6 meets colelctor electrode and the electrochemical capacitor C4 of audion Q2 respectively by resistance R8 Ground connection, the negative electrode of diode D5 connects the base stage of audion Q2, and by electrochemical capacitor C2 ground connection, the emitter stage of audion Q2 connects double Power supply trip circuit, the emitter stage of audion Q2 connects the negative electrode of stabilivolt D7, the plus earth of stabilivolt D7.
Small-sized electric leakage overvoltage/undervoltage the most according to claim 1 protection control circuit, it is characterised in that described residual current is examined Slowdown monitoring circuit includes detection of electrical leakage end Z2 and detection of electrical leakage end Z3, described detection of electrical leakage end Z2 and detection of electrical leakage end Z3 series electrical respectively Resistance R11 and resistance R12 is connected with integrated chip, difference parallel resistance between described detection of electrical leakage end Z2 and detection of electrical leakage end Z3 R10, electric capacity C10 and electric capacity C11, by electric capacity C9 ground connection between described resistance R11 and integrated chip, described resistance R12 with By electric capacity C13 ground connection between integrated chip.
Small-sized electric leakage overvoltage/undervoltage the most according to claim 1 protection control circuit, it is characterised in that described power supply input bag Include power supply input L end and power supply input N end, varistor RV in parallel between described power supply input L end with power supply input N end.
Small-sized electric leakage overvoltage/undervoltage the most according to claim 1 protection control circuit, it is characterised in that small-sized electric leakage overvoltage/undervoltage Protection control circuit is additionally provided with leak(age) test circuit, and described leak(age) test circuit includes the electricity of test switch T and series connection with it Resistance R1 one end, the other end of described resistance R1 is connected with power supply input.
Small-sized electric leakage overvoltage/undervoltage the most according to claim 1 protection control circuit, it is characterised in that described residual current moves Electrochemical capacitor C8 and stabilivolt D8, the described electricity that mu balanced circuit, described mu balanced circuit include being arranged in parallel is included as control circuit The negative electrode solving electric capacity C8 is connected and ground connection with the anode of stabilivolt, described electrochemical capacitor C8 positive pole and the negative electrode of stabilivolt D8 and collection The supply pin becoming chip connects.
Small-sized electric leakage overvoltage/undervoltage the most according to claim 1 protection control circuit, it is characterised in that described dropout power supply electricity Road includes into diode D1, diode D2, diode D3 and the diode D4 of rectifier bridge setting and is connected on a power supply Trip coil L1 between input and rectifier bridge.
CN201620650686.3U 2016-06-28 2016-06-28 Small-sized electric leakage overvoltage/undervoltage protection control circuit Active CN205846688U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201620650686.3U CN205846688U (en) 2016-06-28 2016-06-28 Small-sized electric leakage overvoltage/undervoltage protection control circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201620650686.3U CN205846688U (en) 2016-06-28 2016-06-28 Small-sized electric leakage overvoltage/undervoltage protection control circuit

Publications (1)

Publication Number Publication Date
CN205846688U true CN205846688U (en) 2016-12-28

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107154610A (en) * 2017-06-06 2017-09-12 卢世奎 A kind of overvoltage electric leakage comprehensive protector
CN109525209A (en) * 2018-10-26 2019-03-26 中国科学院长春光学精密机械与物理研究所 A kind of power amplifier for minitype two-axle theodolite

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107154610A (en) * 2017-06-06 2017-09-12 卢世奎 A kind of overvoltage electric leakage comprehensive protector
CN109525209A (en) * 2018-10-26 2019-03-26 中国科学院长春光学精密机械与物理研究所 A kind of power amplifier for minitype two-axle theodolite

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